Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1660f027727b3a07708505c363da308959d1e63f51bb70a6dc4280dda21258c4' 
  AND token = 'zZO6zaadGADmqUJpao7a/u5YHanUs1xThnyeDy5ZB2Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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