Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '08374c195529adf056bbdc559c03ff50bed534334d1609860ac350617b3b3f78' 
  AND token = 'tXy9ztJx8+hBDKLUK5xlZ8/hwfZjS65a55uSHR34kFU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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