Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5284c2a2d4027a96ecc85539765e8dc8705484ba97ed3a6414da5c8944c73c54' 
  AND token = 'tltqtMs8oT2AZicurQU/jolm4thdS1X0aCaqHGZ7CUc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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