Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '81f1443dc1a658e717c8b212ae77ca81e03ccea956a4dff304af8f3233d5d0b4' 
  AND token = '3KLK7/DYTDHqIYx7+6uwR0DZ/IMq9HSxIw0CzgU8ke0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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