Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e383230fc02fab7c38948995bb44feefcea3f2030ddf2fd287625c5eea8e2602' 
  AND token = 'rplzcBcd9uv1pU9kTHXmAMbXBvpAcx2tIKa7kqLZMMI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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