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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7928e05073b658a6f6c22066c613e69c03adfb5678816f10b0bfb675a8ae90cb' 
  AND token = 'CBVi+jYJEfAHuaWp1O50OZ/sqCH98NIRaq5pHRVnFeM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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