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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd07016b1ae6cad67d9b58afe39884b89911ab2efc131ea274953fd4b19bc7d4f' 
  AND token = 'zBKQLHWjLeEU9q8kjE1Km582QubFTXd04L2DxvC8Emw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}