Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa7d435652cb90c5ba1e2473e26aa68fc9796d65c9b36b425e9f8b46fa944acf' 
  AND token = 'PBo9BJxGUVVy4S7KHJwaFX6v6efC3J7KPJadlfXh3TQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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