Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a463bdc6351f2d5fde31d4f554318c6bbcf23e38e0b0a958ca9dac9ba72476c8' 
  AND token = 'yMtvdFM0eVbU1RJXCh68FQ05txbU9CpHQ0WAnXtIwRc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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