Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6c267578870d07f4f17a84e4f0e021c7e722834c1d120ad91d88d2b1eed2894d' 
  AND token = 'VAS6bPK9mtyWOnzNkYvnqG4iWDNI4lU2z2/o2kPuKqg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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