Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a9c90d56e5bd6044dee6827101f04c8c311f9df6113ab474ebfcb088b10ec49d' 
  AND token = 'YbkAbv09Y0c0j6+ItWI6vWmaEd5X2gYksALcZaW90o0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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