Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f86ca863f6fc4fb7703873bbcf548b99e6b9cd64e8a562a386abb1c2e21c295b' 
  AND token = 'xbeEA19sCo93yQUH/kjPcxc0uddosT8+yQjsGrP8vk4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}