Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2c73b71d59c4d9759e406cf9724ff043d139a6c03b452a0e9b67df99ce1e63e5' 
  AND token = 'SLGAEHwaHgPLjx3gwsG1vEgT7nOc4UzIJHHqGEFZYS8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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