SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0998efd37ab62ac295bde985135e6a57ba3dac18823f9f858f49644b5c71042d' 
  AND token = 'HGnK/Wfhy9it4QRE4ZrHSHqv+B/T70s6FuQkuBJVio0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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