Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7cb4ab509a5f7a5df13bec3b0e463f1ecc1950355715733e0710577b3f60e6cb' 
  AND token = '5lOa91kVD+vo2jyalPRO/ERJy4t7QMOD7k5ROxJhnDg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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