Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9cf4ffab569b288e33737034dab642f98539d85d657c20683810c323be6a58f1' 
  AND token = 'gfANfDsu3WfmLWDTrIF8CLtSArkZWQOttR2QnLQlLr8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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