Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a31391661568e9f62e14067934a745bcd4015a5214db09b5e82791ee2e51cccf' 
  AND token = 'FRF9zghBBGq0IPhB8S06nI9f7ByTgno1jTGcZSb8nYA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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