Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6d796589eb2e6655290909075f0564defb44391a17af2465927d9f7fd54218d5' 
  AND token = '5sx7VqV8qF9CB4AyCskXLlHDPry4WvbfUCW/iPZF/A8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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