Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '94b5113d6e35bf4e20c5be074c2d0a161aac810a3a18183780c1d5fce69d63b4' 
  AND token = 'nXCLQfY9bKSR7NTdaEiqfadCg3aXLj3SU7JIneJNUgU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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