Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '66d908b296c38dd176e6d63ad723fa5e5e3f419cb1581719b5384e456ada71d9' 
  AND token = '13Dym/ENDxNvtAJ0NvbaxZ9E+/8NFfsHAtqO+H0skHc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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