SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fc0d2677bcfa4a2d5c2a4b9a96dab5989725e952b84de5149a3eb680c182f623' 
  AND token = 'lCEG7VsszuawG4OHYTOSbBaNHPHsG1LzvRz5KmRqAUU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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