Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '233e3d0503312053c2059deb4bf205787e1733562d2fe86e5a33910066adb900' 
  AND token = 'fvx443Gehu+lVEMciAelNxT+o+po7w7B0LIKYnmUnPY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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