Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6bf2e7465c08586454926f41dfea52f6307ad540853636d6d482b8ba03ea108b' 
  AND token = 'jlnFgQGS+d/y7SuzXf0u9E380dB9wAo+TfLwMS44h5w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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