Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd7fe50b3f573ac67cae70707ceb354953bb6a4b1fa666b9c1801d370b60c383f' 
  AND token = 'G0BVUW/5DYOEAeoxOVZ4Mn6tdgV6RrmvjyWB63h2bgU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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