Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7fa166ece6c1d63dbd5d89f946023ec119ad6bfce3da56de9173155942a321d4' 
  AND token = '8tksjm8siPQsYDS2bCQl+TLPoMinu/zi8qViapIac6E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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