Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a72a5673b6d043fa61387879ccc4b63db4041bddc237a879107a3532c7bc834e' 
  AND token = 'pyK4CuGi1lGP/0zwl4QZdTvZKsQ/ON2QlhyoD/Eoc98=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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