Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'afe49107adaf65b513d1f3faa33d8301472a79b1737b8e0f55cc91088d512d7f' 
  AND token = '58GifiUcJR/Y0tSh2ow/ghw+413XH5vVqkSg0kvesBo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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