Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b42f774897faff2854f8441b4c23a17ac64599ad7a37484de8a194961d7c655d' 
  AND token = 'dkkJ+JZ4OBKcHFUT4gLwJ5TEXZZ5dr4MaSAho1gmgwk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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