Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc153263014e0b67c34d245ac2de2f2a1160d20e3f2a05fe5c8d40b9e349cfa5' 
  AND token = 'BgrhmwD7Ip8XeQ/soCin5Tz5HSEBsJgbKf6nbxNV95o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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