Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5cb6b1c0c106e9d078c153e01b7f21aea9ed63abab94c4f3cf7eb4bdb401fe9c' 
  AND token = 'XxsMBAL0qMfZPyVS6VDcO1qaglSiq2OAWTuSrwAo14c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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