Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'de8569152ecfe42593a7866cdff3391113b75d04d20d68fea6aa99b751c2a30c' 
  AND token = 'Y4ozL88LHY22zj2ZMnkjZsaeTE0jnz519KBHT/T77s0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}