Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '78931219af65845c437cf6fa0b0f2b1d16b523b4c63c9cc9e5e4b40f36fce7ea' 
  AND token = 'NqzGgMTKeQzBNweR/YiDz6497gUE8E9zjf/CFc1QgoA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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