Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a0384733dde332aa288ce0ba21e88c9af5b8505a61370097f42924343041198c' 
  AND token = 'MU5cNdGLkW3nQKEpApWYAHW1HIVk6uR5dxhOQcS8t5o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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