Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1fb57d7533b58de6269914691e0de86809958a2c6385cb8612502d04d08d30c1' 
  AND token = 'ElgunO6FD3oxGR1bX/rkfByI4F4djzwCZQHHn1DtE7E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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