Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '950bdbe63da465a2fe897c661ea982cd02fc73d16d05be9260850b81a420a6ac' 
  AND token = 'H/R6RBeF6/BHTy0/Hlgy74LgBmzTa5bfxBDzRZoah6o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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