SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ddcfb5d3c124e10aadf5fbbaf24ac75671b7a3a4947ba12e7abb6c0742384c02' 
  AND token = 'BUIhC1H9oDXiJAi9lOQdA8VYfKp0Y1t+jluLfKc+z5s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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