Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd14121d486fea7aef6bc8b59e6bd4dd63081cade277297f7a14123daa8e52d5f' 
  AND token = 'SjRLunppe6S9g7r8QerIHdINjrrN8YG+taWaTzYaKB0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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