Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc6b82d63a4093816c13e4760e5bf414ff574a7c70c5cb47288c1b9aa7e4f574' 
  AND token = 'pUBuX1uNKCfkiln2s3yqZAO8uXM5eClauigJdBaCWvQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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