Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '387e9cc6344c8094dcf4ed047113bf9e2c18fad8778b8346176d62dfc9e15ee0' 
  AND token = 'dRgG25J700FEO3usFQppQ8xpwEjOHbCY5t0p+qy0BJ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}