Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2bc93a3ffd347a4ce6f5c18c5d52290712b78f47706a66dc368aff90d545cccc' 
  AND token = 'IROiiqpx/m1SngUp7xwipzSCbBf728ad/AIx5G6XETA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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