Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1c080be0239ff77cf8080ef22ec768a87a8256a8aede1d976da95c1c3ed7cb66' 
  AND token = 'sTFayavvXUt+EA6hMpSEPk93oZ6XsrhY7PWcmiy0f9E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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