Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3ec132fba9aa2f45d2ae18a96aca40d1e63c6e8baef051a9e1514b65c0b8a618' 
  AND token = 'OSIPw/2+XrL2ES0kMs/CQIUUOkYwnTMgqpzveNYhmqs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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