Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd5ff3dd1e8305f4c105d71111a91012468a693926faf4169aa7167a69a661b9d' 
  AND token = '6qZkPejOVB8Qrjtq1b/kuqD1CTOeuABL32ISAQm2Nhs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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