Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a34bd5ed5c3fddc825065b3e433c932ce5f133c7a502a7f7b5b4b559408a4512' 
  AND token = 'kK4ToSFT9JIpLEcjuej7nv2pVAXMqsQ0eVQuGFtfJas=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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