Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '39ede215a0c3c3add4b3286734d287c0f035b89a33bf64b3b70ec2b928af1ff2' 
  AND token = 'g/NyFNu/83HjQCKWfk7cC5E5fBHKKC9qYjyiu7O3rQQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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