SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6980bd7636839f5f72d0bfe43b63d351352f45913864f6618f8370cf4fa4cba6' 
  AND token = 'Wk93Ymkl1ul+78O9jXolySh5w5OjAiBvK0YdZK7i2w8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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