Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a70ea78104030e577eed8884af7ce9fcb525303edc5f6293554cf1c8741572b9' 
  AND token = 'pMA224rgLQHiHE52wq8JWH+0xmdITtb+ttbVAVAwHjA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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