Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f484dca302e4e445e13aac8dfab12a824e628014aff3481954684cc8a6d4405' 
  AND token = 'O/V55dVlMpr8x+YZePPvqslKfuhU1wcIz/LCrW8dUIQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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