Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a7cfba3c9e9c137fa4ba23f1599863d33ebeb9c907a3611c402aeaf38b27b928' 
  AND token = '86S5XlkK69JzuMq7Ok8SRcOvIwsDl8r0fAciZmoHW2I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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