Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3563bae144d0ffbb3b771ac76d97571855b1a194dd5a9b88ca6aa233da7f1089' 
  AND token = '4CWzQTc7DIGmSnGmgwSZ67+bEQCJtuDHOtyyFEuzMVM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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