Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3074367b04abe92ba05733e972236b9d82fe21e7f3a0e290a5d03c2d2997ba4a' 
  AND token = '4Z6cBPydZ5JfkOmftsllZ8qUHbngKZaXPFhJG11/SyA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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