Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e37c6064ffe7e286f5db2dc40b789cd6bc5360e02457ef62ba104b7a7366632' 
  AND token = 'hhusD8ueIVPJxKFVW0liDUYgH7zFSiLfSHBS9vx7uHM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00055

JSON explain

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