Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6cb6a146eb92a1839081e3660b0c7c24af355e01c02c47fd79b3d46a2ac2779c' 
  AND token = 'umDgvEgHMn4h2XzuNSzenU1hNjdSBTILl7Vo9LSfyz8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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