Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8b749698713da74ebd171f3d1e79ba26cd2130ef554f57ddaafcc358cef3a670' 
  AND token = 'rqB/eQxfxwb9PhHDiVWltEw3Swq32m5g9M7OHggSISg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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