Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '00b7546407b7cdf28cba40420d3650ce49d9f855be87950a34f4168ec43f6b7a' 
  AND token = 'gSi5MIEB5QRyxfvRiOkj4ODAM1BeE8aTbipUk3K1qDY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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