Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c6bca04e038b31d3a8b05afe2e7746211034515e12a2e9297d0cd6a021a3b167' 
  AND token = 'cdsGOaEFxh50zDiEUyRNssq7lB4gu3S2nTS3mDLB4zM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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