Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b543957fc236592a79e26d50c7256ceef35612cdc01299ff304c2d0afa572cb7' 
  AND token = 'lm1amSBdNFypOSkPRyMm93zfqkUR/Uvq2iXxINXLr20=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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