Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '269ff79ec0c7227884bf569338297d9808d29855e4d65a238405a13b1770dea7' 
  AND token = 'uiOJXbhezGqH8YI2SwHbRgpZ2nbON61Q4eyiD5egWpc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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