Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ecc7a319ad9f3fb0262d21ec6604c67ad7722dc301d4cc633a78b49961dc6bf8' 
  AND token = '8emNLSoDEPNo+zQO4AVc8n2EnBwb1oA50FxeCdXeMHg=' 
  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"
    }
  }
}