Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '08b0883d755dae76efa4e53d969e33d903fe98a047637dbda0198cc15bf9ce60' 
  AND token = 'G2LC/9WKvxTD5DbsYjt3Ny8yyXmcefygCyJDcLGi4Uc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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