Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd8bdb86e9c8aada30243fb99e7df3349f2ef0a1aa18b46c6fcff79cbe9192d76' 
  AND token = '3HrtD13gRb3/UYt05QQU63qIGXF8RPers1/bzfK77ks=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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