Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e6bc1e504c7b99909ac267fd70386b0f99252450328698afa8ea7d5d2bd021f3' 
  AND token = 'WbpodN8QFTo2jkpSIFEyxbaAPSZeNsFrjYZvP+Cwf/U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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