Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0ec121ab41202e1aad6b0fece4d251909c06a1a6c34c00998a983c25fff292c5' 
  AND token = 'uuWltWezTlpmN061CPl4COiqVGrp0SUvk9mr0qfax04=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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