SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '443b8c41a4e26d342c394fa92b837759ae96f700f35ab8d43d9676a7f438c45d' 
  AND token = 'hL3XvoVpbhhmgldow1YPTEuwJ+gVMeyYxPbL7XyhseI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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