Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f3d4e6360f2bc54529b2c2a67c6063330e3c7035533c45fcbb77b3cda473e2fa' 
  AND token = 'j/euNI+iWDU+kxUnCsVggKwzZ8+8OCDW2+b3acI313w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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